Signal-radiation device utilizing metal portion of connection port as wireless antenna and equipment thereof

Abstract

A signal-radiation device utilizes a metal portion of a connection port as a wireless antenna, including an equipment-connecting port, a resonant capacitor and a high frequency isolation inductor required under certain circuit conditions; wherein the equipment-connecting port is disposed with a metal portion, and one end of the resonant capacitor is connected to the metal portion, and another end of the resonant capacitor is electrically connected to an antenna pin of a piece of wireless equipment; the metal portion and the resonant capacitor together form an LC resonant circuit. By adjusting shapes of a metal wire connected to the connection port and adjusting the capacitance of the resonant capacitor, the LC resonant circuit has an LC resonant frequency equal to a wireless operating frequency, wireless signals can be radiated through the metal portion of the equipment-connecting port which is suitable for wireless equipment with very-small-sized equipment-connecting port.

What is claimed is: 
     
         1 . A signal-radiation device utilizing a metal portion of a connection port as a wireless antenna, including:
 an equipment-connecting port and a resonant capacitor; wherein   the equipment-connecting port is disposed with a metal portion, and one end of the resonant capacitor is connected to the metal portion, another end of the resonant capacitor is electrically connected to a wireless chip; the metal portion and the resonant capacitor together form an LC resonant circuit, and the LC resonant circuit has an LC resonant frequency equal to an operation frequency of the wireless antenna.   
     
     
         2 . The signal-radiation device as claimed in  claim 1 , wherein the metal portion is a floating metal portion isolated from the ground. 
     
     
         3 . The signal-radiation device as claimed in  claim 1 , further including:
 an internal circuit, wherein   the equipment-connecting port is a DC connecting port for connecting with the internal circuit;   the metal portion is a positive electrode of the DC connecting port, and the positive electrode is connected to the internal circuit through a high frequency isolation inductor.   
     
     
         4 . The signal-radiation device as claimed in  claim 1 , further including: an internal circuit, wherein
 the equipment-connecting port is a DC connecting port for connecting with the internal circuit;   the metal portion is a negative electrode of the DC connecting port, and the negative electrode is connected to the internal circuit through a high frequency isolation inductor.   
     
     
         5 . The signal-radiation device as claimed in  claim 1 , wherein the equipment-connecting port is a USB connecting port, and the metal portion is a metal shell of the USB connecting port. 
     
     
         6 . Wireless equipment, including:
 an equipment body;   a wireless chip, disposed inside the equipment body; and   a signal-radiation device comprising:
 an equipment-connecting port and a resonant capacitor; wherein the equipment-connecting port is disposed with a metal portion, and one end of the resonant capacitor is connected to the metal portion, another end of the resonant capacitor is electrically connected to a wireless chip; the metal portion and the resonant capacitor together form an LC resonant circuit, and the LC resonant circuit has an LC resonant frequency equal to an operation frequency of the wireless antenna; and 
   the wireless chip is connected to the metal portion of the equipment-connecting port through the resonant capacitor.   
     
     
         7 . The wireless equipment as claimed in  claim 6 , wherein the metal portion is a floating metal portion isolated from the ground. 
     
     
         8 . The wireless equipment as claimed in  claim 6 , wherein the signal-radiation device further comprises:
 an internal circuit, wherein   the equipment-connecting port is a DC connecting port for connecting with the internal circuit;   the metal portion is a positive electrode of the DC connecting port, and the positive electrode is connected to the internal circuit through a high frequency isolation inductor.   
     
     
         9 . The wireless equipment as claimed in  claim 6 , wherein the signal-radiation device further comprises:
 an internal circuit, wherein   the equipment-connecting port is a DC connecting port for connecting with the internal circuit;   the metal portion is a negative electrode of the DC connecting port, and the negative electrode is connected to the internal circuit through a high frequency isolation inductor.   
     
     
         10 . The wireless equipment as claimed in  claim 6 , wherein the equipment-connecting port is a USB connecting port, and the metal portion is a metal shell of the USB connecting port.